• The Journal of the Acoustical Society of Korea
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• v.20 no.5
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• pp.110-115
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• 2001

In this paper, we propose a beamformer adequate for the nested away that is generally used for multiple frequency band signal processing. The nonisotropic beam pattern of channel in this array causes two problems: the bearing-estimate error of mainlobe and the difference between design and output in sidelobe level. By separating the time delay among channel signals and the time delay among sensor signals in channel, we can remove the effects of the nonisotropic beam pattern of channel in the beamformer output. Through this process, a method to correct simultaneously these problems is proposed.